Lubricating system for internal combustion engines



B. N. PIERCE May 8, 1934.

LUBRICATING SYSTEM FOR INTERNAL COMBUSTION ENGINES 2 Sheets-Sheet 1 Filed Dec. '25 1928 May 8, 1934. N, PlERQE 1,957,909

LUBRICATING SYSTEM FOR INTERNAL COMBUSTION ENGINES Filed Dec. 25, 1928 2 Sheets-Sheet 2 vvue'rfl'o'c Fatented May 8, 1934 UNITED STATES PATENT OFFICE for an internal combustion engine and has LUBRICATING SYSTEM FOR INTERNAL COMBUSTION ENGINES Burt Neulon Pierce, New York, N. Y. Application December 26, 1928, Serial No. 328,406

11 Glaims.

for its object the provision of means whereby a lubricant can be introduced into the combustion chambers l of the engine in order to lubricate the pistons and the valves in accordance with the actual requirements.

Another object of my invention is to provide a lubricating system which tion with the ordinary charge forming can be used in connecdevice now in use on internal combustion engines whereby the position of the throttle valv trolling the passage of to the engine.

Another object of e COD.-

the explosive charge to the engine will control the feed of the lubricant my invention is to provide a system which is exceedingly simple and cheap in construction and one in which a can of lubricant can be readily attached so as to feed the oil to the cylinder and valve of the engine by the suction of the engine.

ternal combustion engine at high speed, thereby overcoming the introduction of the lubricant into the cylinder of the engine when the is idling.

engine Other and further objects and advantages of the invention will be hereinafter set forth a novel features thereof defined by the appended claims.

In the drawings, Figure 1 is a side elevation of an interna bustion engine showing the application nd the 1 comof my improved construction of lubricating system thereto;

Figure 2 is a front view forming device.

In the drawings 1 indicates an partly in section; and Figure 3 is a horizontal section showing a can of lubricant arranged upon one side of the charge internal combustion engine of the multiple cylinder type, 2 an intake manifold, 3 an induction pipe or riser and 4 a carbureter herein shown of the Marvel type. The carbureter is provided with a main fuel The particular construction of carbureter is high speed nozzle 6 over which is immaterial, but I have found by experimenting that very good results can be obtained by introducing the lubricant below the suction controlled valve.

Arranged within the riser 3 is a throttle valve 8 carried by a shaft 9 and having an arm 10 mounted thereon which is controlled by the operating rod 11 in the usual manner.

Ihe above description shows an ordinary form of charge forming device connected to an internal combustion engine and While I have shown a specific construction of carbureter, I do not wish to limit myself to the use of any particular kind of carbureter as my invention consists broadly in introducing a lubricant into the induction passage i'rom a charge forming device below the throttle so that the position of the throttle will control the feed of lubricant to the internal combustion engine.

In the embodiment of my invention as herein shown, I form a bore 12 in the wall of the car-'- bureter e below the suction controlled valve 7 and insert a nozzle 13 to which is connected a pipe 14 extending from a sight feed device 15 which is provided with a needle valve 16 for controlling the passage of lubricant therethrough, said sight feed device being connected to a cap 1:

which is adapted to be screwed over the threaded nipple 18 of an oil can 19 arranged at any desired position in respect to the charge forming device.

The cap 17 carries a depending tube 20 extending to the bottom of the oil can so that all of the lubricant can be drawn out of the can and While I have shown this cap connected to the sight feed device by an elbow 21 and coupling members 22, it is, of course, understood that the particular manner of connecting the cap to the sight feed device is not important so long as the sight feed device is in communication with a source of supply and that the sight feed device is in communication with the nozzle 12 extending into the carbureting passage of the carbureter below the throttle valve.

In the construction shown I have illustrated a simple means through piping and couplings and placing the nozzle in communication with the source of supply through a sight feed device having a valve controlling the passage of lubricant therethrough, so that the amount of lubricant fed to the internal combustion engine can be controlled to a nicety and the operator can inspect the system at any time in order to ascertain whether it is Working properly.

By the particular construction of cap, am able to use the oil can in which the oil is sold so that after one can has been used, it is only necessary to unscrew the cap and insert another can which provides a simple system of replenishing the oil used for lubricating the engine and in carrying out my system, I preferably employ a non-burnable oil such as now on the market which will pass through the cylinder without burning and lubricate the exhaust valves of the engine.

I am aware that prior to my invention various attempts have been made to lubricate the cylinders and valves of an engine by introducing oil into the induction pipe of the engine with the explosive charge produced by the charge forming device, but in all prior devices the lubricant was introduced posterior of the throttle and as the vacuum produced by the pistons of the engine regulates the supply of lubricant delivered thereto, the greatest quantity of lubricant was delivered when the engine was idling or at low speed where it was not necessary and I have found that by introducing the lubricant below the throttle controlling the passage of explosive charge to the engine, that at low speed or idling of the engine, no lubricant will be drawn into the cylinders of the engine and as the throttle is opened and the speed of the engine increases, the lubricant will be introduced at the proper time and requirements of the engine.

In the operation of my improved system of lubrication, I rely on the suction of the engine to draw the lubricant from the source of supply and in the application of my lubricating system to an internal combustion engine provided with a charge forming device as herein shown and described, the nozzle through which the lubricant is introduced is arranged under a suction controlled valve which does not open until sufficient vacuum has been produced in the carbureting passage to cause the valve to be lifted, at which time the engine is running at such a speed that the lubricant is required, but I am also aware that while this particular manner of introducing the lubricant may obtain better results, my improved system will work satisfactorily in connection with any of the well known types of charge forming devices now in use so long as the nozzle is arranged below the throttle valve which controls the passage of lubricant through the nozzle.

While I have shown certain details of construction, I do not wish to limit myself to these details, as I am aware that various changes can be made without departing from the spirit of my invention.

What I claim is:-

1. In a lubricating system of the kind described, the combination with an internal combustion engine having an intake manifold, and a charge forming device connected thereto provided with a suction operated valve, a throttle valve controlling the passage of explosive charge from said charge forming device to said engine, a source of lubricant supply, a nozzzle extending into the carbureting passage of said charge forming device below said suction operated valve, and a conduit extending from said source of supply to said nozzle.

2. In a lubricating system of the kind described, the combination with an internal combustion engine having an intake manifold, and a charge forming device connected thereto provided with a suction operated valve, a throttle valve controlling the passage of explosive charge from said charge forming device to said engine, a source of lubricant supply, a nozzle extending into the carbureting passage of said charge forming device below said suction operated valve, a conduit extending from said source of supply to said nozzle, and means for regulating the passage of lubricant through said conduit.

3. In a lubricating system of the kind described, the combination with an internal combustion engine having an intake manifold, and a charge forming device connected thereto having a suction operated valve, a throttle valve controlling the passage of explosive charge from said charge forming device to said engine, a source of lubricant supply, a nozzle extending into the carbureting passage of said charge forming device below said suction operated valve, a conduit extending from said source of supply to said nozzle, a sight feed device arranged in said conduit and means for regulating the passage of lubricant through said sight feed device.

4. In a lubricating system for internal combustion engines, the combination with an internal combustion engine having an intake manifold and a charge forming device connected thereto provided with a suction controlled valve,

a throttle valve for regulating the passage of explosive mixture to said engine and means for introducing a lubricant into the carbureting passage below said suction controlled valve.

5. In a lubricating system, the combination with an internal combustion engine having an induction pipe and a charge forming device connected thereto, of a nozzle extending into the carbureting passage of said charge forming device, a suction operated valve arranged over said nozzle, a receptacle having a nipple, a cap having a depending tube adapted to be screwed over said nipple, and a pipe extending from said cap to said nozzle whereby the lubricant will be introduced into the carbureting passage at high speed of the engine.

6. In a lubricating system, the combination with an internal combustion engine having a charge forming device having a suction operated valve and means for controlling the passage of explosive charge from said charge forming device to said engine and means for introducing a nonburnable lubricant into said charge forming device below the suction operated valve.

7. In a device for lubricating the cylinders, pistons and valves of an internal combustion engine, the combination with a carbureting passage through which the explosive mixture is adapted to pass, of a suction operated valve mounted in said carbureting passage, a source of lubricant supply having a passage extending bustion engines, the combination with an inter- Y nal combustion engine having an intake manifold and a charge forming device connected thereto provided with a suction controlled valve, of a throttle valve for regulating the passage of explosive mixture to said engine and means for introducing a lubricant into the carbureting passage controlled by the movement of said suction operated valve.

9. In a device for lubricating the cylinders,

pistons and valves of an internal combustion engine, the combination with a carbureter having a carbureting passage through which the explosive mixture is adapted to pass, of an auxiliary air inletfor saidcarbureting passage, a suction operated valve controlling the passage of air through said air inlet, a source of lubricant supply in communication with said carbureting passage, the passage of lubricant from said source of supply to said carbureting passage being controlled by said suction operated valve.

10. In a device for lubricating the cylinders, pistons and valves of an internal combustion engine, the combination with an internal combustion engine having an intake manifold and charge forming device connected thereto having a carbureting passage and provided with a suction controlled valve, a throttle valve for regulating the passage of explosive mixture to said engine, a source of lubricant supply in communication with said carbureting passage and means controlled by the position of said suction controlled valve for controlling the passage of lubricant from said source of supply to said carbureting passage.

11. In a device for lubricating the cylinders, pistons and valves of an internal combustion engine, the combination with an internal combustion engine having an intake manifold and a charge forming device connected thereto having a carbureting passage and provided with a suction controlled valve, a throttle valve for regulating the passage of explosive mixture to said engine. a source of lubricant supply in communication with said carbureting passage, the passage of lubricant from said source of supply to said carbureting passage being controlled by the movement of said suction operated valve whereby lubricant will be supplied to said carbureting passage when said suction operated valve is opened at high speed of the engine to supply lubricant to the pistons, valves and cylinders of said engine. BURT NEULON PIERCE. 

